Table 1.

Baseline characteristics of 1910 adults with CKD on the basis of category of sleep duration

Characteristic	Missing Data, %	Sleep Duration, h
		≤5, n=204	6, n=498	7, n=567	8, n=504	≥9, n=137
Age, yr	0	55±12	53±12	53±12	53±12	55±13
Men, %	0	52	65	64	62	59
eGFR, ml/min per 1.73 m2a	0	54±30	56±32	55±31	52±31	39±26
24-h Urine protein, mg/db	86 (5)	383 [130–1190]	501 [154–1313]	600 [178–1551]	600 [176–1781]	852 [286–2440]
Alcohol drinking, %	0	30	37	39	34	34
Active smoking, %	0	14	15	17	18	17
Health-enhancing physical activity, %	78 (4)	38	43	44	43	35
Body mass index, kg/m2	0	24.7±3.4	24.6±3.3	24.2±3.3	24.4±3.4	25.1±3.5
Hemoglobin, g/dla	0	12.9±1.9	13.1±1.9	13.0±2.1	12.7±2.0	11.9±2.0
Serum albumin, g/dla	0	4.2±0.4	4.2±0.5	4.2±0.4	4.2±0.4	4.0±0.5
Unmarried, %	46 (2)	18	17	15	16	18
Low income, %	27 (1)	34	19	18	25	39
Low education, %	0	29	20	20	26	31
Diabetes, %a	0	29	30	30	35	48
Hypertension, %b	0	92	96	96	97	99
Cardiovascular disease, %	0	7	12	9	12	18
Physical component summaryb	0	67±21	75±17	76±16	71±18	62±21
Mental component summary	0	64±21	72±17	72±16	69±18	62±20
Low physical component summary, %	0	27	12	9	18	32
Low mental component summary, %	0	25	11	13	16	30

Data are expressed as mean±SD or median [interquartile range].

^aP for trend <0.001.

^bP for trend <0.01.